|
Characteristics
|
N (%)
|
Smoking status
|
Chi-square
|
P
|
|---|
|
Nonsmokers (N = 17,993)
|
Current smokers (N = 1549)
|
|---|
|
Sex
| | | |
805.2
|
<0.001
|
|
Boys
|
9723 (49.75)
|
8416 (86.56)
|
1307 (13.44)
| | |
|
Girls
|
9819 (50.25)
|
9577 (97.54)
|
242 (2.46)
| | |
|
Age range (years)
| | | |
304.7*
|
<0.001*
|
|
≤ 13
|
3904 (19.98)
|
3797 (97.26)
|
107 (2.74)
| | |
|
14-
|
3038 (15.54)
|
2894 (95.26)
|
144 (4.74)
| | |
|
15-
|
3302 (16.90)
|
3026 (91.64)
|
276 (8.36)
| | |
|
≥ 16
|
9298 (47.58)
|
8276 (89.01)
|
1022 (10.99)
| | |
|
Location of school
| | | |
26.3
|
<0.001
|
|
Urban
|
7346 (37.59)
|
6858 (93.36)
|
488 (6.64)
| | |
|
Rural
|
12,196 (62.41)
|
11,135 (91.30)
|
1061 (8.70)
| | |
|
School level
| | | |
659.3
|
<0.001
|
|
Middle school
|
9617 (49.21)
|
9175 (95.40)
|
442 (4.60)
| | |
|
Academic high school
|
5495 (28.12)
|
5140 (93.54)
|
355 (6.46)
| | |
|
Vocational high school
|
4430 (22.67)
|
3678 (83.02)
|
752 (16.98)
| | |
-
*Linear-by-linear association chi-square test results
